Design and Analysis of MEMS-Based Sensors Toward Measuring Catheter Contact Forces

Sitaramgupta V, VSN and Arjun, BS and Pal, U and Pandya, HJ (2022) Design and Analysis of MEMS-Based Sensors Toward Measuring Catheter Contact Forces. In: IEEE Sensors Journal, 22 (13). pp. 13451-13461.

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Abstract

A contact force sensor is a critical clinical unit while performing cardiac ablation procedures. The success rate of these procedures is determined by the effective contact between the tip and the heart tissues. Using a miniaturized, susceptible tri-axial force sensor in the cardiac ablation catheter is quintessential to determine the force acting on the tip accurately. This paper discusses the design, fabrication, and comparison of two MEMS-based force sensors that can potentially be integrated with the catheter tip for better sensitivity. The working principle, shape (ring-type), and outer dimensions of both the sensors are similar, with a strategically positioned narrow rectangular cavity in the second sensor. Finite element analysis is performed to validate the performances of both sensors with the experimental results. The experiments show that sensor 2 (with the rectangular cavity on bridges) has ~sim 1.84� higher sensitivity than sensor 1 (bridges with no rectangular cavity). The results demonstrate the possibility of integrating the sensor with the catheter tip for measuring catheter contact force. © 2001-2012 IEEE.

Item Type:	Journal Article
Publication:	IEEE Sensors Journal
Publisher:	Institute of Electrical and Electronics Engineers Inc.
Additional Information:	The copyright for this article belongs to the Institute of Electrical and Electronics Engineers Inc.
Keywords:	Ablation; Cavity resonators, Atrial fibrillation; Catheter tip contact force; Contact forces; Force; Force sensor; Force transfer; Force transfer structure; Piezoresistive devices; Piezoresistive force sensors; Radiofrequency ablation; Ring-type force sensor; Sensitivity; Tip contact; Transfer structure, Catheters
Department/Centre:	Division of Electrical Sciences > Electronic Systems Engineering (Formerly Centre for Electronic Design & Technology)
Date Deposited:	21 Sep 2022 09:39
Last Modified:	21 Sep 2022 09:39
URI:	https://eprints.iisc.ac.in/id/eprint/76697

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